I do not think that platinum 3 will be the last place you reached. Remember it took you 3.5 years to reach here, so why shouldn't you reach the next stage in another 3.5 years? Maybe 5 years? Maybe 10 years? But you could definitely reach there. Keep investing into crypto and there is a big chance you could make profit there as well, and you could use those profits to gamble and reach higher levels.

I am not saying that you should gamble no matter what, if you are in financial stress at any point in your life, gambling should be the first thing you should stop doing, but as long as you can afford to gamble, why not? This is why I believe, someone who has grinded so much, will be capable of wagering more in the future as well, even if you keep the same pace, you could reach new levels by just keep doing what you have done so far, but longer period of time.